{"action":"Upgrade ruby-concurrent to 1.3.7-1 or later.","affected":[{"fixed":"1.3.7-1","introduced":"0"}],"component":"ruby-concurrent","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.3.7-1"],"id":"tcs_01M5NSZS8KWRY8RS7HCF9G9JE8","modified_at":"2026-10-26T11:47:34.609938533Z","published_at":"2026-06-24T17:17:29.403Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-54905","https://security-tracker.debian.org/tracker/CVE-2026-54905"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-54905#Debian:14/ruby-concurrent","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-54905"}],"summary":"concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReentrantReadWriteLock can incorrectly grant a write lock after one thread acquires the read lock 32,768 times. The"}